Re: Demise of the COM port?
From: Guy Macon (http://www.guymacon.com)
Date: 03/20/04
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Date: Sat, 20 Mar 2004 05:25:35 -0800
Viktor Kesler <viktor@cardware.co.yu> says...
>Yes, but we need 9600Bd at up to 1km with a few kV isolation.
>We use a 20mA-loop dongle stuck into the PC COM port. Works like a
>charm and the only thing that can burn it is a lightning strike - and
>even then the PC never gets damaged, only the dongle.
>
>So, building USB into our product doesn't make sense because it's not
>near the PC. We've already got an ethernet tcp/ip module, but that's
>not much use if there isn't already a LAN running around the place.
I fail to see why you think you need a LAN. If you can run a cable
for your 20mA, you can run a cable for 100BaseT. Do a web search
on "ethernet crossover cable."
-- Guy Macon, Electronics Engineer & Project Manager for hire. Remember Doc Brown from the _Back to the Future_ movies? Do you have an "impossible" engineering project that only someone like Doc Brown can solve? My resume is at http://www.guymacon.com/
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